Menthol-sorbed activated charcoal, cigarette filter, and filter-tipped cigarette

Patent metadata

Field	Value
Publication number	US-2016205997-A1
Application number	US-201615083799-A
Country	US
Kind code	A1
Filing date	Mar 29, 2016
Priority date	Oct 20, 2010
Publication date	Jul 21, 2016
Grant date	—

Abstract

Menthol-sorbed activated charcoal stably holding menthol during storage, and smoothly releasing menthol only during passage of tobacco smoke therethrough is provided. The menthol-sorbed activated charcoal is featured in that to activated charcoal having a specific surface area of 1500 m 2 /g or more but 1700 m 2 /g or less as measured by the BET method, menthol is sorbed at a sorption rate of 80% or more but 92% or less with reference to the saturated amount of menthol for the activated charcoal.

First claim

What is claimed is:

1 . A method of producing a cigarette filter containing a menthol-sorbed activated charcoal, the method comprising:
adsorbing menthol on activated charcoal at a menthol sorption rate of 80% or more and 92% or less with reference to the saturated amount of menthol for the activated charcoal to prepare the menthol-sorbed activated charcoal, wherein the activated charcoal has a specific surface area of 1500 m 2 /g or more and 1700 m 2 /g or less as measured by the BET method; and incorporating the menthol-sorbed activated charcoal into a cigarette filter to produce the cigarette filter containing the menthol-sorbed activated charcoal.

2 . The method according to claim 1 , wherein the filter has two or more segments, and the menthol-sorbed activated charcoal is contained in a portion thereof.

3 . The method of according to claim 1 , wherein a material of the cigarette filter is a cellulose acetate material.

4 . A method of producing a filter-tipped cigarette, the method comprising:
wrapping a cigarette filter produced by the method according to claim 1 and a tobacco rod comprising a tobacco filler in a tipping paper to connect them.

Assignees

• Japan Tobacco Inc

Inventors

• Sakai Yoshinori

Classifications

• A24D3/163

  Carbon · CPC title

• A24D3/14

  of organic materials as additive (of ion exchange materials A24D3/12) · CPC title

• A24D3/0287

  for composite filters · CPC title

• A24C5/47

  Attaching filters or mouthpieces to cigars or cigarettes, e.g. inserting filters into cigarettes or their mouthpieces (A24C5/52 takes precedence) · CPC title

• A24D3/061 Primary

  containing additives entrapped within capsules, sponge-like material or the like, for further release upon smoking · CPC title